首页|Trichoderma spp. As potential biological control agent against Alternaria solani in potato
Trichoderma spp. As potential biological control agent against Alternaria solani in potato
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NSTL
Elsevier
Alternaria solani is the main pathogen causing early blight on potato, considered to be one of the most important diseases of potato worldwide. The application of fungicides to control early blight in the field has become more difficult because of the constant appearance of mutated isolates that show fungicide resistance. The potential of Trichoderma as a biological control agent (BCA) to control diseases in other pathosystems has already been shown in several studies. However, only limited knowledge is available for the control of A. solani by BCAs in potato. In particular, little information is available on the effects of BCAs applied to whole potato plants. Therefore, the aim of our study was to evaluate the potential of Trichoderma spp. as a BCA against A. solani on three different scales: axenic culture, in the greenhouse, and in the field. In summary, a controlling effect of Trichoderma against A. solani in potato was shown at all three scales. Additionally, it was demonstrated that the choice of a single Trichoderma strain can strongly influence the outcome and that even strains from the same species show different efficiencies. However, a significant reduction of early blight in the field was only observed in one out of four years of field trials. A significant correlation between in vitro, in vivo, and field performance in one year could not be detected, which highlights the importance of trials under natural conditions to determine the effectivity of BCAs in practical fields. Our research shows the overall potential of Trichoderma spp. as a BCA against A. solani on potato. Therefore, our results serve as a basis for further improvement, which is needed to develop Trichoderma spp. into effective and reliable BCAs against early blight in potato.
NSTL
Elsevier
